This amazing keto peanut butter swirl brownie recipe will change the way you think about low-carb desserts.
If you’ve been missing your favorite chocolate treats since starting the keto diet, these rich, fudgy brownies are exactly what you need. They combine two of the best flavors – dark chocolate and creamy peanut butter – into one perfect dessert.
What makes these brownies special is the beautiful swirl pattern that isn’t just for looks – it creates different flavors in every bite. Sometimes you get more chocolate, sometimes more peanut butter, and sometimes that perfect mix of both.
Plus, they’re really filling, so a small piece will satisfy your sweet tooth without breaking your diet. The best part is that these brownies are super simple to make, even if you’re new to keto baking.
👍 Why You’ll Love This Recipe
Super Fudgy Texture: Unlike many keto brownies that turn out dry and crumbly, these stay incredibly fudgy thanks to the natural peanut butter and perfect ratio of ingredients.
They have that dense, rich texture that real brownie lovers crave, and they stay moist for days in the fridge. You won’t believe they’re keto!
Two Flavors in One: Why choose between chocolate and peanut butter when you can have both? Each bite gives you a different combination of flavors.
Beautiful Looking: These brownies aren’t just tasty – they’re beautiful too! The swirl pattern makes them look like they came from a fancy bakery.
Each time you make them, the pattern comes out different, making them perfect for special occasions or when you want to impress your friends and family with your baking skills.
Freezer-Friendly: These brownies freeze beautifully! You can make a batch and store them in the freezer for up to three months. Just pull one out when you need a sweet treat, let it come to room temperature, and it tastes just as good as fresh.
✨ Recipe Ingredients
- 1 Egg (large)
- 6.5oz Natural Salted Peanut Butter (unsweetened)
- 1/4 cup erythritol OR Xylitol
- 1/4 teaspoon Prue Vanilla Extract
- 1/4 cup Almond Milk (I recommend this one – amazon)
- pinch of Salt
- For the brownie layer follow my keto cocoa brownies recipe (don’t bake, we only need the batter)
👨🍳 How To Make
Follow this easy recipe:
Step 1
For the brownie layer, follow my keto cocoa brownies recipe and make the batter. It’s very simple.
Step 2
Preheat the oven to 345°F and line a baking pan (I used an 8×8 one) with parchment paper.
Step 3
To make the peanut butter layer, add all the ingredients (except the brownies batter) to a large mixing bowl. Whisk until smooth.
Step 4
Spread about half of the brownie batter in the pan and add the peanut butter on top. Then, put dollops of the remaining brownie batter on top, and use a knife to swirl everything together.
Step 5
Bake for about 25-30 minutes or until the center is just set. Then, remove from the oven and let it cool for 15 minutes. Remove from the pan and slice. Enjoy!
💡Tips
1. Room Temperature Ingredients
Take your eggs and almond milk out of the fridge at least 30 minutes before starting. When these ingredients are at room temperature, they mix much better with the peanut butter and create a smoother batter.
Cold ingredients can make the peanut butter seize up and become lumpy, which affects both the texture and the swirl pattern.
If you forgot to take them out early, put the egg in a bowl of warm water for 5 minutes and microwave the almond milk for 15 seconds – just don’t let it get hot, slightly warm is perfect.
2. Timing Is Everything
The baking time of 25-30 minutes is just a guide – ovens can be different. Start checking at 25 minutes by gently shaking the pan.
The center should be set but still have a slight jiggle, like Jell-O. If it’s wobbling like liquid, it needs more time.
If it’s completely firm, it might be overbaked. Remember, these will continue cooking for a few minutes after you take them out, and they firm up more as they cool.
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FAQ
1. Why did my brownies come out dry?
First, you might have baked them too long – even 5 extra minutes can make them dry. Second, check if you used the right amount of almond milk and peanut butter – these ingredients provide moisture.
Also, natural peanut butter brands can vary in thickness, so if yours was very thick, you might need an extra tablespoon of almond milk.
2. How do I know when they’re done baking?
The best way to check is the jiggle test. Gently shake the pan – the center should be set but still have a slight jiggle, like firm Jell-O.
If you stick a toothpick in the center, it should come out with a few moist crumbs, not completely clean (that means they’re overbaked) or wet with batter (underbaked).
Keto Fudgy Peanut Butter Swirl Brownies
Print RecipeIngredients
- 1 Egg large
- 6.5 oz Natural Salted Peanut Butter unsweetened
- 1/4 cup erythritol OR Xylitol
- 1/4 teaspoon Prue Vanilla Extract
- 1/4 cup Almond Milk (I recommend this one – amazon)
- pinch of Salt
- For the brownie layer follow my keto cocoa brownies recipe (don't bake, we only need the batter)
Instructions
- For the brownie layer, follow my keto cocoa brownies recipe and make the batter. It’s very simple.
- Preheat the oven to 345°F and line a baking pan (I used an 8×8 one) with parchment paper.
- To make the peanut butter layer, add all the ingredients (except the brownies batter) to a large mixing bowl. Whisk until smooth.
- Spread about half of the brownie batter in the pan and add the peanut butter on top. Then, put dollops of the remaining brownie batter on top, and use a knife to swirl everything together.
- Bake for about 25-30 minutes or until the center is just set. Then, remove from the oven and let it cool for 15 minutes. Remove from the pan and slice. Enjoy!